i started out with dracula, frankenstein, the werewolf and the mummy. they were scary when i was a kid. then, i saw "the night of the living dead" in 1968. i was in a cold sweat all night long. it was in black and white but i think that's what made it so creepy. now, its all about blood and guts. the more blood, the better. my favorites are "the day of the dead" and "dawn of the dead". both "dawn of the dead" movies are great. if you like to be scared, these will chill you to the bone.
Top Ten Horror Movies of the '70s is recommended by chipmunk1026